uint32 OTHER                      = 0
uint32 UNKNOWN                    = 1
uint32 MAXSPEED_LIMITS              = 2
uint32 END_MAXSPEED_LIMITS          = 3
uint32 MINSPEED_LIMITS              = 4
uint32 END_MINSPEED_LIMITS          = 5
uint32 END_ALL_SPEED_LIMITS         = 6
uint32 BICYCLE_LANE                 = 7
uint32 END_BICYCLE_LANE             = 8
uint32 CITY_LIMITS                  = 9
uint32 END_CITY_LIMITS              = 10
uint32 PEDESTRIAN_ZONE              = 11
uint32 END_PEDESTRIAN_ZONE          = 12
uint32 RESIDENTIAL_AREA_ZONE        = 13
uint32 END_RESIDENTIAL_AREA_ZONE    = 14
uint32 SCHOOL_ZONE                  = 15
uint32 END_SCHOOL_ZONE              = 16
uint32 NON_NUMERICAL_LIMITS         = 17
uint32 MOTOR_WAY                    = 18
uint32 END_MOTOR_WAY                = 19
uint32 EXPRESS_WAY                  = 20
uint32 END_EXPRESS_WAY              = 21

uint32 sign_type